<!DOCTYPE html>
<html>
    <head><meta charset = "utf-8"></head>
    <body>
        <h1>--- <加减乘除> ---</h1>

        <form action="/test_cgi", method="GET">
            <h3>x : <input type="text" name="data_x" value="0"></h3>
            <br>
            <h3>y : <input type="text" name="data_y" value="1"></h3>
            <br><br>
            <input type="submit" value="提交">
        </form> 
    </body>
</html>
